Marcus S. Dempster, MD
NPI 1881223519ActiveIndividual· Internal Medicine, Hematology & Oncology· Williamsville, NY
Internal Medicine, Hematology & Oncology (MD) in Williamsville, New York, trained at Wright State University Boonshoft School of Medicine (class of 2020). Part D covered 151 prescriptions written in 2024, 83% of them generic.
Overview
| NPI | 1881223519 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 4, 2020 |
| Last updated in NPPES | Jun 2, 2026 |
| Certified by provider | Jun 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 331143 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (NY) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 151 · 173 30-day fills |
|---|---|
| Patients | 74 |
| Total drug cost | $106,782 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Wright State University Boonshoft School of Medicine |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Internal Medicine |
Medical group
- Rpci Oncology, PCWilliamsville, NY · 65 clinicians
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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